Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d86f0e0229bada4…

MALICIOUS

PDF

44.0 KB Created: 2020-08-07 05:14:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 10d6ff1580b1a052e6db3a4bb53f5bcf SHA-1: 038fb0e0b8cdae9c40bc81f73971c90f71d10d9b SHA-256: 6d86f0e0229bada44afe1cdf19dc8ba7b40a7478cc33b54af73d0a6a00f134e9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous embedded links, including one pointing to a known malicious redirector. The primary link, 'https://ttraff.com/pify?keyword=dermatitis+acneiforme+pdf', is designed to lead users to potentially harmful content. The document's structure suggests it is part of a link farm or SEO manipulation tactic to distribute malicious content. No scripts were extracted, but the presence of malicious links is sufficient evidence of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=dermatitis+acneiforme+pdf
    • http://files.columbuscoasterco.com/uploads/1/3/1/3/131379761/tarivadowida_fokal_jaliluvenajot.pdf
    • http://files.sharonlasalle.com/uploads/1/3/1/3/131380107/2163114.pdf
    • http://files.prakrutischool.in/uploads/1/3/2/6/132682790/8799765.pdf
    • http://files.canningcomputerrepairs.com.au/uploads/1/3/0/8/130814176/4323761.pdf
    • http://files.nducuwangugi.com/uploads/1/3/0/9/130969555/gimuviri-megatanizus-selusifo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/6346/7414/files/xiperobadepetukuvikokireb.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zogubarekerebadopotuleju.pdf
    • https://cdn.shopify.com/s/files/1/0429/0979/4463/files/jokatewe.pdf
    • https://cdn.shopify.com/s/files/1/0435/6515/4463/files/yasin_dan_tahlil_rumi.pdf
    • https://cdn.shopify.com/s/files/1/0432/9183/6566/files/reading_eggs_books.pdf
    • https://cdn.shopify.com/s/files/1/0430/4997/5959/files/english_test_free.pdf
    • https://cdn.shopify.com/s/files/1/0436/4995/8046/files/nijixilu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9977/5381/files/17310771522.pdf
    • https://cdn.shopify.com/s/files/1/0434/0645/9032/files/blumenfeld_neurology.pdf
    • https://cdn.shopify.com/s/files/1/0432/7473/1685/files/dagexinunowejobolewafav.pdf
    • https://cdn.shopify.com/s/files/1/0433/2643/9582/files/jiguzemiwozokukovomobe.pdf
    • https://cdn.shopify.com/s/files/1/0431/2409/7191/files/tinanarokoraxowim.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/66656561998.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ebd.bin
c5a2c93ccfbcda1436adec3097a5fe8451365d5e28d08bc2cf1e24ba4d423a3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EBD 5268 bytes
font_01_sfnt_off00008095.bin
2acd7f3343f147b6cea55e29414fe7e17783a501ac0f3968c006ce30924506d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8095 10144 bytes

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